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Throughout history, many of the richest of the rich have felt a responsibility to help the less fortunate.
Billionaire investor and philanthropist Warren Buffett has taken the call to action a step further by asking billionaires to follow his lead.
By signing The Giving Pledge, created by Buffett, billionaires make a public promise to dedicate most of their wealth to philanthropy.
To date, there have been more than 125 pledgers from around the world, many of them high-profile philanthropists and self-made titans.
Bankrate put together a list of the 10 richest signers of The Giving Pledge, aside from Buffett, using net worth information as of Dec. 12, 2014, from Forbes.